On this day in physics: 09 March 1611- Johannas Fabricius, a Dutch astronomer, was the first to observe and formally publish a paper on sunspots, dark spots on the Sun which he found quite curious.
Word of the Day- Positron- The positron is the antiparticle of the electron. It was first hypothesized by PAM Dirac and discovered in 1932. It has the same mass and spin as an electron, but has opposite charge. If an electron and positron were to collide, they will annihilate creating gamma ray radiation and the two particles will vanish.
Quote of the Day: "In the beginning there was nothing, which exploded." -Terry Pratchet
Keywords: Positron, electron, charge, annihilation, antiparticle.
